IIIH
US007254620B2
(12) United States Patent ao) Patent No.: Us 7,254,620 B2
Iwamura et al. (45) Date of Patent: Aug. 7,2007
(54) STORAGE SYSTEM
(75) Inventors: Takashige Iwamura, Yokohama (JP);
Yasutomo Yamamoto, Sagamihara (JP);
Yoshiaki Eguchi, Machida (JP);
Hiroshi Arakawa, Sagamihara (JP);
Kouji Arai, Odawara (JP)
(73) Assignee: Hitachi, Ltd., Tokyo (JP)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 572 days.
(21) Appl. No.: 10/224,091
(22) Filed: Aug. 19, 2002
(65) Prior Publication Data
US 2003/0225861 Al Dec. 4, 2003
(30) Foreign Application Priority Data
Jun. 3, 2002 (JP) 2002-161713
(51) Int. CI.
G06F15/16 (2006.01)
(52) U.S. CI 709/217; 709/213; 709/223;
709/225; 711/112
(58) Field of Classification Search 709/213,
709/217,219,225,223; 711/112 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
